#include <iostream>
#include <vector>

using namespace std;
class Solution
{
public:
    bool isBoomerang(vector<vector<int>> &points)
    {
        vector<int> v1 = {points[1][0] - points[0][0], points[1][1] - points[0][1]};
        vector<int> v2 = {points[2][0] - points[0][0], points[2][1] - points[0][1]};
        return v1[0] * v2[1] - v1[1] * v2[0] != 0;
    }
};
int main()
{

    system("pause");
    return 0;
}
